| 制定BNR工艺最佳运行策略：模拟预测并试验验证 |
| 摘要点击 2410 全文点击 1459 投稿时间：2009-05-07 修订日期：2009-07-24 |
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| 中文关键词 BNR工艺 工艺参数 模拟预测 试验验证 混合液回流比 溶解氧（DO） |
| 英文关键词 BNR process process parameters modeling prediction experimental verification return ratio of mixed liquor dissolved oxygen (DO) |
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| 中文摘要 |
| 应用一生物营养物去除（BNR）工艺（BCFS）模型，模拟预测工艺参数对出水水质的影响，同时在实验室建立试验装置对模拟预测结果予以试验验证，得出了模拟预测与试验结果近似一致的结果.这表明，在很大程度上数学模拟技术可以替代中间或现场试验，从而被用来诊断运行问题、并制定工艺运行优化策略.模拟与试验显示，回流A与进水之比值（rA）为1.5时，生物除磷效果不受厌氧池微生物量所限制，回流A的大小与COD与N去除率无关；当回流B（rB）＞2后流量再行增大对提高TN去除效果作用有限，且对COD及TP去除没有影响；回流C（rC）开启与增大对COD、TP及TN的去除几乎没有影响；好氧池DO（DOR5）在1～2.5 mg·L-1以内时对COD、TP的去除均无影响，但当DO<2 mg·L-1时，出水 NH+4-N则升至1 mg·L-1.因此，最终确定BCFS工艺最佳运行参数为：rA=2，rB为2～2.5，rC=0，DOR5为2～2.5 mg·L-1. |
| 英文摘要 |
| Based on the process model of a BNR system (BCFS),the effects of operational parameters on the effluent quality were predicted by modeling,and were testified simultaneously by a lab-scale experiment,from which almost the same results in the modeling and the experiment were obtained. This means that modeling can be realizably applied to make the optimal operation schemes regardless of pilot-scale and/or full-scale experiments. Both the modeling and the experiment demonstrated that the bio-P removal performance was not influenced by the biomass amount in the anaerobic tank when the returned ratio (rA) reached 1.5 and that rA had no significant correlation with COD and N removals. After the returned mixed liquor ratio (rB) increased over 2,the TN removal efficiency was not improved any more,and the COD and TP removals were not influenced by the variations of the rB. The returned mixed liquor ratio rC had almost no influences on the COD,TP and TN removals. Further,the COD and TP removals were not influenced when the dissolved oxygen (DOR5）in the aerobic tank was in the range of 1-2.5 mg·L-1,but the effluent NH+4-N increased over 1 mg·L-1 when DOR5 was below 2 mg·L-1. So,the optimal operational parameters for the BCFS should be set at rA=2，rB 2-2.5，rC=0，DOR5 2-2.5 mg·L-1. |
